Brake shoe clamp



July 19, 1949. R. DQ'BYQ'YDv BRAKE SHOE CLAMP Filed'Nov. 22, 194e nim:

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Patented July 19,1949

UNITED STATES PATENT Y oFElcE l 2,476,533 v 'l Y Y BRAKE snor; CLAMPv pRaymond Daley Boyd, San Antonio, Tex. Application November 22, 1946,Serial No. 711,77 91 This invention relates to brake equipment forvehicles and more particularly to a brake shoe clamp jack unit.

The purpose of such a clamp unit is to hold I brake shoes of a brakeassembly set in place, without any other device to help in the matter,so an operator can repair or replace them easily by himself.

It is an object of this invention to provide'a new and improved brakeshoe clamp jack unit that will avoid one or more of the disadvantages`or limitations of the prior art.

Another object of the present invention is to provide a new and improvedbrake shoe clamp keep them operably in position when the shoe set isassembled.

Other objects will become apparent as the invention is more fullydescribed.

Fora better comprehension of the invention, reference is made to thedrawings, wherein a particular form is illustrated by way of example,and detailed in the following description. claims emphasize the scope ofthe invention.

Referring to the drawings:

Figure 1 is a iront elevation of a brake mounting plate showing a set ofbrake shoes and linings positioned on said mounting plate through theaid of clamp jacks embodying this invention; and

Figure 2 is a perspective View of one jack clamp positioned on a sectionof a brake shoe and linto the same that is free, brings it up intoposition for place- The work is consid-` ment by himself alone. ered aone man job. Then both hands are needed, so he manipulates his knee,elbow or fore- 5 Claims. w(Cl.` 2li-286) armV tov retain the rst brakelshoe invplace, while he removes the firsthand to use it with the otherhand to get the second brake shoe onto the mounting plate and hinged tothe first shoe. He thenattempts to attach thecoil spring intended tohold both shoes placed in a set. This involves the `use 'of both handsand during the process he must let go of the bake shoes to accomplishVit.`

\ Since the shoes must beheld in place while the previously described.

spring is being attached, the operator usesrsuchv other parts 'of vhisbody, that he considers suitable and available for the purposatogtherwith such skill in doingy so as he can command.y This may` involve theuse of his feet, kneesvqand hands together,-` working awkwardly,inconveniently, and precariously. Y Frequently the operation,

does not succeed, untilafter manytrys, during which time the brakingfluid is lost and injury may be done to the operator. y f p v' y In thisinvention,` clamp ,jacks are used, that are readily placed to positivelyhold the parts so the brake shoes may be placed in positionconveniently, easily and rapidly. It avoids "the troubles incurred intheconventional method Referring to the drawingsQinwhich azparticular formof the 'invention is indicated, a brake V shoe clamp'jack YI0 consistsof @a flatpiece of metal or otherv suitable material having a generallyrectangular form with an upwardly extending lug Il having a springanchor hole I2 perforated in it. It is usedifor holding each brake shoeflange I`3v and' I4 respectively to its respective lining I5 or |16, asthe case may be. The open and'rigid mouth like orice I1 at the lowerportion of the clamp jack I0 enables it to slip over the shoe flange andlining easily to raccomplish this. ',Ihe orifice I1 recesses back vintothe rec-I .v tangular form ina longitudinal direction and terminates inan enlarged arcuate opening I8 as indicated in Figurel 2. The lower jawI9' of the orice I1 is retracted back of the upper jaw 20 in order toavoid interference with the web 2l of the brake shoe. The jaw y2li isbent' slightly on an angle and out of line with lower jaw I9 to preventthe device from slipping. The'clamp jacks are mounted transversely overeach shoe ange and lining adjacent the pins 22 as shown in Figure 1, near the'upper portions '23 of the brake shoes. The so-called upperportions'23 are those coupled to the hydraulic cylinder 24.'

The bottom portions 25'of the brake shoes are held togetherwith a pin 2Band serve'to provide a hingeiarrangement for the brake shoes in a set. f

A coil spring 21 with shank and hooks 28, is

set and in place on the mounting plate 30, the

clamp jacks are easily removed by pulling them.

backwards. This makes them slip oif the linings and anges, with thespring 27', ready for further use on another brake assembly,v

The clamp jack unit consists of three parts,

4 gether and force the jaws against the flanges, whereby the shoes willbe held rigidly together in their normal positions.

2. A clamp unit for vehicle brake shoes comprising a pair of jacksincluding jaws arranged to slip the flanges of a pair of hinged brakeshoes with lining thereon, and a spring mounted on .the end portions ofsaid jacks disposed outside of the flanges when placed thereon, saidspring being arranged to tension said end portions together andi forcethe jaws against the flanges, whereby the shoes will be held rigidlytogether in their normal positions, said jaws being of slotted formpenetrating the jacks transversely to allow each flange to enter to itsfull width and engage one'ofithe parts of the jaws at its limit ofinsertion, ,and .the other part freely over to a namely, two clamp jacksI0 and a tensioning spring 2'I. They are operated and used Withouttools, and can "be placed in position by 4the. hands of theuser by thesimple process of pushing the jaws over the brake shoe anges andlinings.After which they are manipulated to place them in position. This doesnot require much eiiort and can be done with the spring 2'I attached ornot attached, whichever may be necessary or preferred. When the'completeunit is attached to the assembled brake shoe sets it is brought to thebrake mounting plate and mounted thereon with little or no trouble.`Slight variations in the sequence of the assembling of the unit'may berequired vfor Ydifferent brakes, but in generaLthe same steps in theprocess are followed, although indifferent sequence. There are usuallythree springs holding the brake shoe flangel tensioned together. Theupper spring .is termed the long spring and loops over the pins 22 onthe two flanges and are horizontally oposite each other in Figurel. Theother two springs'are small and eacharealso attached at one end-to asta-` tionary pin on aY brake housing or mounting plate-30. The oppositeends are each secured on av pin on the ilangesl I 4 and ,I3 respectivelyas shown in Figure 1. These latter: springs arelocated adjacent thehinge portion 25 of the brake shoes, The last two vsprings are detachedwhen the brake shoes are removed for any purpose,- and form va singlebrake unit rigidly with al1 itsV remaining detachable Darts when theclamp de...

vice is mounted thereon, as shown in Figure 1.V

The clamp jacksv fit the shoes so conveniently, that the operator canactuate themin various di.

reotions Vto produce different resultarby his hands alone, and withsufiicientl leverage to enable him to de so easily. This may beaccomplished' With, out danger to himself er injury to thev brakes.

While but one general form of the invention is shown in the drawings'anddescribed in the specifications, it is not desired to limit this ap,-plication for patent to this particular form or in any other wayotherwise than limited by the scope thereof. as it is appreciated thatother forms of construction could be made that would use the `sameprinciples and come within the scope of the appended claims. A

Having thus described the invention, what is claimed is:

l. A clamp unit for vehicle brake shoes comprising a pair of jacksincluding jaws arranged to slip the flanges of a pair of hinged brakeshoes with lining thereon, and a spring mounted on the end portions ofsaid jacks disposed outside of the anges when placed thereon, saidspringbeing arranged to tension said'end portions to larger area of'the liningwhereby said parts will closelygrip the lining and flange between them.

3. A clamp unit for vehicle brake shoes cornprising a pair of .jacksincluding jaws arranged to slip the ilanges` of a pair of hinged brakeshoes with lining thereon, and a spring mounted on the end portions ofsaid jacks disposed outside of the flanges. when placed thereon, saidspring being arranged to tension said end portions together and forcetheV jawsagainst the flanges, whereby the shoes will be held rigidlytogether in their normal positions, said jaws' being of slotted formpenetrating the jacks transversely to allow each ange to enter to itsfull width and engage one of the` parts of the jaws `at its limit ofinsertion, andtheother part freely over to a larger area of the liningwhereby saldi parts willclosely grip the lining and ange between them,the position of the spring on the end por-` tions being such as toexerta leverage on the jaws and. Substantially stress the jaws'againstsaid anges and linings.

4. A, clarnpunitfor vehicle brake shoes comprising a pair of jacksincluding jaws arranged to slip theanges of a pair of hinged brake shoeswith lining thereon, and afspring mounted on the end portions 4of saidjacks disposed outside 0f She anges When placedthereon, said springbeing arranged totension said end portions to-I gether and y:torce thejaws against the flanges,

whereby the shoes will be held rigidly togetherv the position of therspring on .the end portions the jaws to belong enough to encompass themAand provide an excess space, therefor.

5.',A clamp unit for vehiclebrake shoes comprising a pair of jacksincluding jaws arranged; to slip the angesof a `pair ofV hinged brakeshoeswith lining thereon, and a spring mounted on the end portions ofsaid jacks disposed outside of the angeswhen placed thereon, said springbeing arranged,A to tension said end portions togather and` force.theijaws. against theanges,

5 whereby the shoes will be held rigidly together in their normalpositions, said jaws being of slotted form penetrating the jackstransversely to allow each ange to enter to its full width and engageone of the parts of the jaws at its limit of insertion, and the otherpart freely over to a larger area of the lining whereby said parts willclosely grip the lining and flange between them, the position of thespring on the end portions being such as to exert a leverage on the jawsand substantially stress the jaws against said anges and linings, theposition of the jacks being angular to one another when placed on thebrake shoes with the portions to which the spring is attached beingspaced further apart the portions in which the jaws are disposed, theportions of the jacks including the jaws being slotted back- RAYMONDDALEY BOYD.

REFERENCES CITED The following references are of record, in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,663,602 Kunkel Mar. 27, 19282,359,996 Marnell Oct. 10, 1944

